Function writeUint16

helpers/macho/memory.js:405–429

(arr, off, val)

}

export function writeUint16(arr, off, val) {
    if(arr.length < 4 || off > arr.length || off < 0) { //We should never underflow or overflow our buffer
        throw new Error('Cannot write OOB.');
    }


    if(val.length > 0xffff) //Values that after serialization never will be a 16 bit integer should never be treated
        throw new Error('Invalid argument. This should be a valid 16-bit integer.');

    let old = new Array(arr[off], arr[off+1]);

    if(val <= 0xff) { //Integers below 256 are always valid
        arr[off] = val;

    } else if(val > 0xff && val <= 0xfff) { //Integers bigger than 256 but below 4096 should be treated as two bytes instead of one and fixed with a leading zero
        arr[off] = parseInt('0x'+(val.toString(16).split('')[0] + val.toString(16).split('')[1]));
        arr[off+1] = parseInt('0x0'+val.toString(16).split('')[2]);

    } else if(val > 0xff && val <= 0xffff) { //Integers bigger than 256 and below 65535 should be treated as two bytes and can be splitted without having to fix them with a leading zero
        arr[off] = parseInt('0x'+(val.toString(16).split('')[0] + val.toString(16).split('')[1]));
        arr[off+1] = parseInt('0x'+val.toString(16).split('')[2] + val.toString(16).split('')[3]);

    }

}